}

func (g *graphPopulator) addPV(obj interface{}) {
	g.updatePV(nil, obj)
}

func (g *graphPopulator) updatePV(oldObj, obj interface{}) {
	pv := obj.(*corev1.PersistentVolume)
	// TODO: skip add if uid, pvc, and secrets are all identical between old and new
	g.graph.AddPV(pv)
}

func (g *graphPopulator) deletePV(obj interface{}) {

	defer g.lock.Unlock()
	g.deleteVertex_locked(podVertexType, namespace, name)
}

// AddPV sets up edges for the following relationships:
//
//	secret -> pv
//
//	pv -> pvc
func (g *Graph) AddPV(pv *corev1.PersistentVolume) {
	start := time.Now()
	defer func() {
		graphActionsDuration.WithLabelValues("AddPV").Observe(time.Since(start).Seconds())
	}()
	g.lock.Lock()
	defer g.lock.Unlock()

	p := &graphPopulator{}
	p.graph = graph
	for _, pod := range pods {
		p.addPod(pod)
	}
	for _, pv := range pvs {
		p.addPV(pv)
	}
	for _, attachment := range attachments {
		p.addVolumeAttachment(attachment)
	}
	for _, slice := range slices {
		p.addResourceSlice(slice)
	}
}

func randomSubset(a, b int) []int {